Exam 14: How Evolution Works

After reading an essay written by ________,both Charles Darwin and Alfred Wallace became aware of the potential for populations to increase beyond their environment's capacity to provide for all individuals,resulting in competition for survival.

Which of the following agricultural practices is supported by our current knowledge of the evolutionary process?

Which of the following statements about evolution is true?

The term sexual dimorphism refers to a species in which

________ are the preserved remains of formerly living organisms.

One frequently observed example of evolution is

In populations that have a high degree of genetic diversity,the fundamental cause of evolutionary change is

As terrestrial organisms,both insects and vertebrates evolved legs with joints,but the last common ancestor shared by these lineages existed long before vertebrates had evolved.This knowledge makes it possible to predict that

Many weeds have become resistant to the herbicides that were once used to control them.Which of the following statements best explains this observation?

The number of different types of organisms found on Earth is primarily a result of

Human embryos and fish embryos share a number of features.Why?

Upon his return to England,Darwin realized that the species he had seen in the Galápagos Islands were distinctive to that locale.Which of the following statements best explains the uniqueness of the assemblage of species that Darwin observed?